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تأثیر مرحله شیردهی و تعداد شکم زایش بر ترکیبات شیر در میش عربی | ||
| علوم دامی | ||
| دوره 33، شماره 126، خرداد 1399، صفحه 147-156 اصل مقاله (1.13 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/asj.2019.124310.1821 | ||
| نویسندگان | ||
| معصومه عبدالخانی1؛ صالح طباطبائی وکیلی* 2؛ طاهره محمدآبادی2؛ حسین جوینده2 | ||
| 1دانش آموخته کارشناسی ارشد فیزیولوژی دام دانشگاه علوم کشاورزی و منابع طبیعی خوزستان | ||
| 2دانشیار گروه علوم دامی دانشگاه علوم کشاورزی و منابع طبیعی خوزستان. | ||
| چکیده | ||
| هدف از این مطالعه، بررسی اثر مرحله شیردهی و تعداد شکم‌های زایش بر ترکیبات شیر در میش عربی بود. تعداد 30 رأس میش عربی (10 رأس به ازای هر شکم زایش اول، دوم و سوم) در قالب طرح کاملاً تصادفی با میانگین وزن اولیه 47 کیلوگرم استفاده شد. پس از زایش میش‌های هر گروه، هر دو هفته یکبار و به مدت دو ماه جمع‌آوری نمونه‌های شیر برای ارزیابی میزان ترکیبات شیر انجام شد. درصد پروتئین شیر در زایش دوم روندی نوسانی داشت. در میش‌های شکم سوم، بیشترین درصد پروتئین شیر مربوط به ماه دوم شیردهی بود (05/0>P). در زایش‌های اول، دوم و سوم، درصد چربی شیر با پیشرفت دوره شیردهی افزایش یافت (05/0>P). در میش-های شکم سوم، بیشترین میزان ماده جامد شیر مربوط به هفته هشتم شیردهی بود (05/0>P). در میش‌های شکم اول، درصد ماده جامد شیر در کل دوره شیردهی در نوسان بود (05/0>P). میزان لاکتوز شیر در هفته هشتم شیردهی میش‌های شکم اول و سوم بیشتر از شیر هفته دوم تا ششم دوره شیردهی بود. pH شیر در میش‌های یکبار زایش با ادامه شیردهی افزایش یافت (05/0>P). بطور کلی، خصوصیات فیزیکوشیمیایی شیر میش‌های عربی بجز میزان خاکستر و چگالی تحت تأثیر دوره‌های شیردهی قرار می‌گیرند. | ||
| کلیدواژه‌ها | ||
| دوره شیردهی؛ شکم زایش؛ خصوصیات فیزیکوشیمیایی شیر؛ میش عربی | ||
| عنوان مقاله [English] | ||
| Effect the lactation period and parities on milk composition in Arabi ewe | ||
| نویسندگان [English] | ||
| Masoumeh Abdolkhani1؛ Saleh Tabatabaei Vakili2؛ Tahereh mohammadabadi2؛ Hossein Joyande2 | ||
| 1M.Sc. graduate of Animal physiology, Agricultural Sciences and Natural Resources University of Khuzestan, Ahvaz, Iran | ||
| 2Department of Animal Science, ّFaculty of Animal and Food Sciences, Agricultural Sciences and Natural Resources University of Khuzestan, Ahvaz, Iran. | ||
| چکیده [English] | ||
| The aim of this study was to investigate the effect of lactation stage and numbers of parities on milk composition in Arabi ewe. Thirty Arabi ewes (10 ewe per each group from first, second and third parity) with average weight of 47 Kg in randomized design were used. After the parturition of ewes from each group, milk samples were collected every two weeks for two months to evaluate the milk composition. In the third parity ewes, the highest milk protein percent was related to the second month of lactation (p < 0.05). In the first, second and third parity, milk fat percent was increased with lactation progress (p < 0.05). The highest amount of total solid was belonged to ewes in their third parity in the 8th week of lactation (p < 0.05). In the first parity ewes, the amount of total solid was fluctuating with lactation (p < 0.05). In first and third parity of ewes, the percentage of milk lactose in the 8th week of lactation was higher than the previous stages of lactation. In the first parity ewes, pH increased with progress the lactation period (p < 0.05). In general, physicochemical characteristics of Arabi ewe milk, except ash and density, were affected by parity and lactation stage. | ||
| کلیدواژه‌ها [English] | ||
| Lactation, Parity, Milk composition, Arabi ewe | ||
| مراجع | ||
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